I'm getting a Hornet system installed in Jan... Remote start, keyless entry, turbo timer, LCD Pager, 3 point immobolioser, shock sensor, proximity sensor.... all that stuff... so i don't know how it compares to the boomerang but i've used hornet before and it's all good.
Retail (from memory) is about $1k + extras for remote start, drivers door motor etc... but i never pay retail where i get my stereo gear etc... so I'm paying les...