I had a Valvestate II the for-runner of the AVT and didn't like it. However the next generation may have got better !

I currently have a TSL and an MG15MSII and they are great.

However what suites my style of playing may not suit yours ! So If you can hall you self down to a music shop and A / B em.

If it is not possible Id go for the MG however that is just my 2c and Im not saying one is better than the other !