If you are after something with roughly the same output (believe the WTX260 was 300 watts). My vote in order is...
- Mesa D350
- Genzler Magellan 350
both of the above are 350 watts at 4 ohms.
To me the D350 is the perfect lightweight amp. No fan, lightweight, but does not feel like a toy. All the tone shaping options I want with nothing extra. Voicing control covers a good range, EQ handles the rest.
I like the Genzler for similar reasons, but it has a fan. The EQ section is slightly different than the D350, but overall I can approach it the same as the D350. Contour for initial voicing (Genzler has a contour button to change the voicing of this knob). I prefer the Low Mid/High Mid control not eh D350, but Genzler has a parametric mid which is just as usable. Genzler 350 is stable at 2.67 ohms if you need that. This is why I originally bought one since I was using it with 3 Phil Jones Bass Compact 2 cabinets.