My issue I had with soundcards equipped with the mini headphone jacks and using ALL the analog outs was two problems related to connectors. It did not impact "SQ" per say but more of a functional problem.
1) Decent (meaning not flimsy) did not all fit properly when trying to plug them in. I had the $20 monster cable ones, but when trying 4 pairs of them in soundcard at the sametime, on a few of the cables the plug actually bent-plus it caused a lot of strain on the connectors attached to the circuit board. Even trying to find cheapo cables with a thinner headphone jack was near impossible.
2) Trying to secure them so they stayed plugged in all time. With them all wedged and squeezed together, it was hard to keep them connected snuggly.
Lucky for me, my new soundcard had a din cable with all the jacks hanging separately off the card (dongle cable). Although, the original "dongle" cable had problems, I was able to make a new one with my own connector, cable and RCA plugs. :)
The 1010LT is great card that will let you do audio processing on a PC AND it has RCA connectors. That is a win win situation. There are plenty of options to go with that will range from $200- thousands of dollars-but you need to look at "PRO" type cards-regular consumer cards will give you trouble getting it work if it does not have the proper "software AND hardware routing".
Audiotrak prodigy hifi is another card that is proven to work with all the processing plugins.
Which ones of these can you get in Brazil, I don't know. For the plugin processing, I have tried to compile a list of cards that are "known to work" or someone has used it in that application. If you steer off that list, then you are working in uncharted territory. That list is in the link I provided earlier.
Define the features you need/require, and then go shopping to see if it meets your goals. Most decent namebrand soundcards are pretty damn amazing when it comes to accurate signal reproduction. ;)
I hope this all makes sense to you. :)