pro tools hdx 3 and Space + other heavy plugins

[groovebrother]

hi,

i am a big user of reverb instances as i don't really like to send differents instruments in the same reverb (sometimes 8 to 10 TL Space opened).

I am still running a tdm system with 6 accel cards.

i was wondering how many space (true stereo) can i open using hdx cards at 24/96khz and still having the possibility to add other heavy plugins ?

If i recieve tracks to mix i may also need to open the MDW EQ on many tracks wich is the only EQ i use to mix with the Puigtech EQP1A

i am also a big fan of parallel compression so i may need lots of Aux with the following compressors : impact, but also waves compressors like puigchild, api 2500, h-comp & v-comp.

this in order to be abble to make re recodings if needed with no latency or, mix a band in live situation up to 48 tracks.

All of this would require lots of dsp ressources.

Would a hdx 3 do or, should i consider having more than 3 hdx cards as i do not intend to use native plugins ?