Sacriste---
Hmm, what does "affordable" mean to you? Definition varies a lot; especially in _this_ place...
The V6s aren't bad, but they have problems with treble and some find their sound a bit on the analytical side. I like mine, and for $60 they are a deal. But there is a better (though costlier) option...
The Sennheiser HD280s sound a lot better to me, and go for under $100. ($80 low price seen on net, $100 in a "real" store or from Headphone.com). These have better isolation than the V6, have no real sonic flaws, and have a more engaging soundstage IMO. They sound great with a JMT amp as well!
The problem with Senn earbuds for close range use near the S.O. is that they leak more than a bit of sound. The V6s are a lot better in terms of less leakage, and the 280s are just about the best. The Etymotic ER6 canal plug is also a great solution, but at $140, it sort of pushes the definition of "affordable".
Finally for pure cheap thrills, the Senn HD 202 at $30 is affordable and better balanced overall than the V6. The 202 lacks the V6s pleasantly deep bass and is not as isolated, but it also lacks the V6s shrill treble and shallow soundstage as well...
So Sacriste, the best solution really depends on your price range needs:
Less than $50: $30-- Sennheiser HD202s
Less than $100: $60-- Sony V6
Less than $125: $100-- Sennheiser HD280
Less than $150: $140-- Etymotics ER6
Also S, I notice you live in Venezuela, so a lot depends on what you can find available locally, unless you want to order internationally from Headphone.com which has all the above phones. Ultimately though I don't think any of the 4 choices above will disappoint...
Let us know what you decide on and can find.
Good hunting!