beeneen, I'm 30 and have owned 4th gen f-bodies since I was 16..
95 TA LT1 6 speed, bolt ons, 8.30 in the 1/8th
98 Z28 LS1 6 speed, mostly stock, 13.60 at 107 in the 1/4
98 TA LS1 cam, LT's, all bolt ons, full suspension, 382 rwhp, never had it at the track..
While owning all these cars, I've always had the GN, I will never give it up, however the amount of money I've had to sink into it vs. the Fbodies doesn't compare..3 engines, 3 tranny's, always something to replace/repair..now G-bodies are great looking cars, and there is nothing like the sound of a TE45A at 28 psi, but if you want something that runs reliably all the time, and gets beat on all the time, stick with the v8 cars..with the Buick's, you're always wanting more from them, and it does not come cheap. Ported heads, roller cam, billet main caps to withstand high boost, all the MACHINE WORK involved with the block, you will have the engine in and out more than once to get the car the way you want it. Texas heat and high boosts don't mix too well. I need to upgrade the cooling system, fans, tranny cooler, now the trans is slipping after only having the car tuned for under a year and never being at the track.
I'd say it mainly depends on how deep your pockets are and if you can afford to have some down time. If this is your only car or daily driver, stick with the Fbody. I've got so much money tied up in this car, it will take decades for the car market to catch up where I could sell it and not break even, right now, I'd be lucky to get 10-12k for the car, and I probably have that in the drivetrain by itself over all these years..
With that said, I love my GN, it's my baby, etc..but I do miss the reliability of the LS1, high rpm, V8 sound, looks, handling, interior, etc..
Now I've gotta spend about $1500 on a trans rebuild, the car really needs another paint job after 7 years, needs interior work, etc..and will never be a show car.
My .02.
Edit: that sounded like I'm dogging my car. I'm not, I love this thing to death, and truly enjoy working on it, it's fairly old tech and you can actually see what you're doing under the hood. I'm just saying if this is your first HI-PO car and it needs to start when you want it to start, stick the the more reliable Fbody.