Re: Floor board effects units... which one and why ?
I don't have any personal experience with the latest round of do-it-alls, but I've been looking into getting one myself and have read every single review for the GT10, X3 Live, GSP1101, Tonelab and the G9.2tt. Don't flame me, anyone who has these or finds me rediculously anal for actually reading all the reviews (I'm often bored at work) but here's what I've found:
X3 live - good amp models, especially for high gain with lots of tone options stemming from the split tone path. Unfortunately, it's build quality is suspect for gigging purposes.
GT10 - good low gain and clean models, better quality effects than the pod but not as good high gain amp models, very robust and immense tweakability. Unfortunately, it has little computer support/interface isn't great, and some aspects of the tweaking can be too "deep".
GSP1101 - Very good reviews for its amps and effects. Solid interface and good tweakability. Built well. Unfortunately, it's a rack processor and you'd have to buy a midi foot controller for live use, adding another 1-300 bucks.
Tonelab - Good clean, overdrive and hard rock sounds, dynamics and warm vintage tone. Unfortunately, it doesn't have the number of effects/models that the others do and is limited with things like it's effects loop is before the preamp (essentially nullifying the point of an effects loop) and certain effects can't be used together, like distortion with compression or wah.
G9.2tt - Offers an innovative 2 expression pedal set-up with fast switching and decent amp models. Voiced for modern sounds and hi gain. It seems to do nothing the best, but nothing bad either, a consistent #2 in most people's comparisons. Unfortunately, it is also limited in the number of models and simulators it boasts and there's not a lot of tweakability.
These are my findings from just reading through the reviews at Harmony Central over the last little while as I've been doing my own research. I've tried to leave out my personal feelings for what are advantages based on taste, but let me know if you have any other questions. Like I said, these aren't based on personal experience as much as what I've read from other people's experience. I can't say enough that the only way to decide would be to play each you're considering for at least an hour or so with amps/guitars you'll be using with it to see what it sounds like and if it'll work for you. Nothing beats personal experience.