By 2020 Russia projected GDP will be only slightly lower than USA ones now. Subtract CBG, foreign bases and some airforce - and you'll understand what Russia will able to support even larger land army than USA. And well, Russia need it too - larger land army.
I'm not fan of CBG, but they are very usefull political instrument. Still i dont think Russia will have money and politcal clout to utilize one in 2020. Some goes for very large missile cruisers - recent advances in missile technology allow to field long range ASM on frigates. Still, 3-4 are needed as flagships. Resources should be concentrated on SSN's and SSBN's for strategic defence and corvetes / SSK for border defence. Number of SSBN's around 12-14.
Border guard maritme aviation - nothing like strategic bombers, just a hybrid recce/attack plane able to lauch guided missile against poorly armed contrabandists boats. Present strategic maritime aviation (Tu-22M3) should join strategic forces, and these (if need) will carry strike mission over water.
Aviation - support and upgrade current park, aquire some mid-size PAK-FA fleet (about 100-150), develop future UCAV's. Stronger point on upgrading transport aviation.
SAM's - upgrade current forces and aquire new technic. Pretty vital part.
ICBM's - same here. Maintain current numbers.
Tanks and other vehicles - current numbers are ok, need only upgrade. Land army in general need everything upgraded, but i would give it less priority than strategic forces. It is impossible to to have compact "professional" land army due to need of maintaning mobilization reserves and larger territory. So there will be always "full-ready" units and "part-strength" units with reduced manpower and technic on conservation. Jon K numbers are ok for full-strength units, but i think Russia addidionally need about same sized part-strength units.
SSK's for Baltic - given very long range coastal ASM's and Tu-23M's any number will do. 6 or 12 - doesnt matter much here.
Most optimistic projections of Russian GDP for 2020 are 6,3 trillion USD, roughly close to today's combination of UK, France and Italy, or about half of the US GDP of today. Consider that under current programs for land forces UK is planning to buy 700 FRES vehicles, France too has 700 VBCI in it's order books with both countries not having a future tank even on their drawing boards.
Italy, France and UK have a total of 18 mechanized brigades now, relying much on Cold War legacy equipment. Larger Russian spending combined with fact that it's a single country with emphasis on land forces, might give Russians somewhat more troops, that's because of my optimistic estimate of roughly 25 mechanized brigades.
For navies, UK, France and Italy combined in 2020 will probably have 4 large aircraft carriers, 1 small one, about 13-20 SSN, 8 SSBN's. The carrier battle groups will not have sufficient escorts, though, they're suitable for international flag waving and low intensity conflicts. If Russians wanted to have an operational carrier battle groups by 2020 they would be already busy constructing them. There's no signs for this.
The price of arms is set to rise, Russia cannot escape this fact. The current armaments program 2007-2015 is clearly unrealistic and cannot be attained, thus my very rough prediction. Soviet equipment will be totally outdated by 2020 except for modernised strategic bombers and perhaps for some modernised tanks (such as T-80). Furthermore, Soviet equipment has not been stored properly, which lessens it's value for future Russian army.
Strategic bombers with cruise missiles are a good Russian asset for offering long range strike capability, and they are already existing, so under no conditions I would disassemble that force.
And we must remember that the GDP projection is extremely optimistic and propagandistic, and it is not widely accepted. It's simply taking into account Russian economic growth from post-Soviet collapse low and predicting it to continue until 2020 without taking into account possibilities of oil price changes, demographic crisis etc. Additionally, as Russian GDP per capita grows, effects of PPP factor will decrease, even though I don't think it's important in military procurement.