Actually, the V8 Solstice won't be much of a killer compared to the Corvette and Viper. The LS2 engine will be detuned to keep the drivetrain from breaking. Expect to see whp under 300 HP on the original drivetrain.
Now if you can afford the cost of upgrading with the same drivetrain in a Corvette then you will have a great performer, expect to pay over $25 for this complete upgrade though. If you want to keep your mods under $10k then wait for the GXP version next year and spend the money on carbon fiber lighten parts (hood, deck lib, spoiler, etc). For under $35K you can get 250+ whp and weight in the 2600 lb catergory. This will get you running 0-60 in the low 5's and 1/4 mile in the mid 14's.