SRX 05-Mainly used for D&B, got some good preset pads n waveforms to twist up, proper 808 drum kit n some other good drums. Decent overall card.
SRX 04 & 10- Good quality add-on patches for strings & brasses already given with your Fantom, but in my opinion not really necessary.
SRX 05 Supreme Dance. The 808(All TR Menu) drum kit on this card is no different to the kind of kit which is used by the dirty south producers (Young Jeezy, TI, Mike Jones, Slim Thug etc). Adding a bit of compression, limiting, eq & reverb you can get some phat drums! Also the Phat Trak, Soulful & Street kit presets are rocking with a little sumting. Got some extra decent waveforms (depending if you have a decent analog synth).
SRX 10 Big Brass. Like this card but i do think in retrospect i should have got Orchestra card, but it is intricately different to the inbuilt AC:BRASS section. Little bit to similar to AC:BRASS section, so try to audition before purchase.