audio valve eklipse or aesthetix calypso


hi all I'm looking to replace my vtl 2.5 pre with either audio valve eklipse or the calypso, anyone has experience with these please give me their pros and cons
thank you
kabaraka
thanks again Teajay,I'll try tube rolling after getting the unit. I notice a little roll off on the high frequencies or may be it's the warm characteristic of the eklipse.may be the dealer set up.
Update.
I revisited tube rolling with my Eclipse.
A pair of NOS 5960 really did smooth things out and take a harsh edge off of what I had previously felt was decent sound.
I agree completely that better tubes (left side)make this an even better pre amp.
The RCA clear tops that I had tried (bought used)must have been sub standard or used up.
Update! just got the eklipse yesterday and the dealer also offered a demo unit which is very new of the Coda CSX amp so I took it home too. The eklipse is being ran in and it sounds fabulous already. Thanks all for the comments. Anyway,any opinion on this Coda amp is welcomed.
Cheers