If gaming is all you do, the x4 955be will be as fast as the 1055t and is easy to OC due to being BE.
1055t is a superb chip, can go to 4.5ghz on a good board (890FX) and has plenty of gaming performance, plus two extra cores come in handy if you do a lot of 3d rendering or File format conversions..
Depends on the money you want to spend and what you see as future proof..
No PC technology will future proof you from having to upgrade or replace parts, as that is the relentless march of progress.
Decide on a budget set over a time frame with the performance level you need, then purchase and play until the time frame is up, then upgrade and rinse and repeat...
The key here is not to spend too much if you have the level of performance you need. There is no point having 100+fps when by the time it makes a diffference, you will be in the upgrade cycle already.
The 955 is a good chip and one I believe is better suited to your board, think of it as a great stopgap with buckets of performance untill Bulldozer arrives and you can then get the lay of the land on New Mobo and Bulldozer upgrades!