The VXP is not an all in one box if youre looking for something thatll do both clean and dirty. Ive used an mp20 (the same pre as in the VXP) for a little while and there is barely a hair of a dif bet that pre and Maudio's DMP2 pres. The DMP2s may be a drop airier, or they may not. In blind tests I did, it was impossible to tell the dif. And thats with layering tracks. The DMP2s (or the DMP3s which are the upgrade) can be had for under $200 for 2 pres. The MP20 and the VXP both go for $500. Really not worth the money IMO.
The only reason to my mind that the MP20/VXP units enjoy such unqualified respect is bec their 8 channel pre, the M80, is used by several mid level studios as a cleaner alternative to mackie and some board pres. I will say they are very clean at high gain where Maudio was a bit noisier but still clean. If youre not working with high gains as I dont usually have a need to turn the gain beyond the 12 o clock, (which I dont unless Im room micing or micing overheads) then you really should save your money. Especially if youre looking for diversity. Presonus pres are not diverse. The IDSS just covers the top end and slightly boosts the low mids, barely noticably. Get a meek or mindprint which are much more diverse.