There's three ways to get the warp, two of which will give you edge blending. SOL7 does edge blending, but cost prohibative.
Nthusim is the pit builder version of SOL7 without edge blending. Cost $489
Warpalizer gives you warp and edge blending. Going through Ivar's site (great tutorial here
http://www.ivarhestnes.com/ivarhestnes.com/Downloads/Visual%20system%20tutorial.pdf )and emailing him gets it down to 350 Euro I believe, and you get both versions.
Then there is Immersive Display Lite 2, which is 39 euro and has some "soft edge blending".
no fisheye, but you want to avoid a lot of keystone adjustment in your setup.
Windows desktop will not warp, so it will look odd on startup. Only the games warp. Also, you'll need short throw projectors for the most part, iunless you have tons of room and no obstructions (i.e. cockpit shell) you'll never do this with standard projectors.