Unless you're primarily doing video encoding/rendering, and not a lot of gaming, I don't think the 1055T is worth it.EncodingRendering
The i7-750 performs better than the 1055T on about half of the benchmarks. The i7-860 performs better on all but one of the benchmarks.
I think that you'd see better results for less money by upgrading your current setup, since you say that you can't afford the 1090T. Until CrossFire/SLI becomes necessary, I'd suggest putting off that upgrade. A 5850 should hold you for a while, possibly until you end up building a new computer. (Depending, of course, on how demanding your games are and what your monitor's resolution is.)