I have an aging Peavey Special 212 with a zoom g9.2tt for my effects, that is starting to develop problems as my backup amp. I have decided on Line 6 as my new backup amp. However I am torn I have a pretty nice main rig but for smaller venues and nights I feel lazy enough not to lug a 412. My 2 choices right now are the Spider IV 150 212 and the Spider Valve 212. I have tried both in store and was impressed by both but since I was attempting to be mindful of those around me I couldnt give either a proper test. Any feedback from anyone familliar with both models? Also I have a nice assortment of speakers at my house I was wondering if swapping the speakers voided warranty.