Nachob,
If you really want a softer and more comfy Recaro seat, I would not recommend the Euro-R seat which is essentially a Recaro Sport. While I find the Recaro Sport fairly comfortable, it may be too firm for you if you think the stock seats are too firm.
The most comfortable aftermarket seat I've tried is the Recaro Style. Its padding is a bit softer and it is a wider seat than the Recaro Sport so you don't feel completely held. It comes w/ various options such as heatting and vent system, electric recline for seat adjustment, etc. but no side airbags.
If you want aftermarket seats, there is no way you can retrofit the side airbags to the Recaros. Even if you could, you shouldn't as the airbags may not function properly as they were not designed to be used with non-OEM seats.
BTW, here's a link to the Recaro Style seat I was talking about
:
http://www.on-trackperformance.com/recaro_style.htm