Very few people have had access to the MV 25 yet, as it is barely released and most retailers haven't received them.
As for any of the 25W amps, you really need to try them. The EL84 amps sound and feel quite different from 6L6/EL34 amps, and it's personal taste. I love 6L6 amps, but also love my Mini Rec, so much so that I ordered a MV 25 the second I heard about it, sight unseen.
Some people hate the EL84 amps. I think dodger's experience is pretty common.
My overall take on the EL84 amps is:
1. I love the small/light form factor. Easy to pack and carry! Super easy to own and carry a spare head just in case at rehearsals and live gigs (which I do).
2. Good prices, especially used.
3. The tone is surprisingly good, volume is surprisingly loud. Very useable for home and club gigs.
4. Not just littler versions of the big brothers, they are actually voiced a bit differently. In my case, I like the MR more than the Single Rec. But it has more in common with the SR than the Dual Rec.
5. If volume, weight, price and size were not a consideration, I would probably stick with the full-size versions. I really like 6L6 amps. But in truth, 50W is overkill for almost any venue. And 100W is really for stadium use. Many will disagree on that, but listen to the audience comments in a club when the guitarist is running a 100W Marshall into a 4x12. If you can hear them...
NOTE ON WATTAGE: For clean tones, the sky is the limit for Watts. You don't generally want to push the power stage, so it doesn't matter, and often helps, to have massive overkill of power. For crunch, you generally do want to push the power stage. This is why Mesa often recommends running clean at higher power than lead. So for me, a cool option would be 50W 6L6 for clean channel and 25W EL84 for rhythm/lead. I generally don't like the lower power modes in Mesa's amps because they seem squishy to me, and I prefer tight dynamics with lots of punch.