Portra 800 pushed two and rated at EI 2000? That has quite low graininess for that rating. Oops, this as APUG. Under no circumstances must you do what I have just suggested, then use Photoshop, OK?
Pushing is such a subjective issue. Here are my totally unreasonable opinions from my direct, recent experience:
Tri-X in Diafine or DiLuxol Vitesse at EI 1250 or 1600. These are both two-bath developers that give good speed and low graininess. DV is currently unavailable, but I think that it has the slight edge on Diafine for shadow detail and graininess. It is a Barry Thornton developer. A formula that produces very similar results to Diafine is available if you want it, otherwise you'd have to get it mail order. Over on the
Rangefinder Forum your fellow countryman Peter gets his from
Freestyle I think. It lasts forever. DV lasts a long time. I managed to develop 32 films in the only litre I ever had before accidentally contaminating Bath A, so I can't say whether or not it lasts as long as Diafine. Hopefully DV will be available again. It is also sold as a dry kit. You can get a bit more speed out of these two-baths by developing twice, but you need a very good wash inbetween.
Otherwise I use Xtol diluted 1+3 to 1+5 for pushing Tri-X and TMY to EI 1600 or 2000. You have to watch your minimum solution quantities, and use distilled water. I haven't had the same success pushing Delta 400 this way - that's responded better to DD-X at 1+4. I've never tried it at higher dilutions.
With one exception that I'll mention in a minute, EI 2000 is my preferred speed limit for 120.
Because I find that I'm shooting at f/1 or f/1.2 at 1/15 with EI 2000 in the sort of places I do my thing in, MF is not really an option even with EI 3200 - so I use 35 mm. So I can use TMZ for speeds over EI 2000. Again, I develop in dilute Xtol.
And now for the ringer: HP5+ at EI 3200 developed by
dr5, one of the generous sponsors of APUG with whom I have no commercial interest. I've had results that please me from HP5+ at EI 800 (in Ron Spillman's Resofine) but it has never been my film of choice at higher speeds. It's a soft film to begin with, which helps when pushing - the softness at EI 800 is one of the things that endears me to it for gentle people pictures. Remember this is my personal opinion, and I don't have to justify it to anyone but myself, for my own work.
Anyway, back to the story. dr5 will develop HP5+ to EI 3200 and I'm quite impressed with the results. I'm not sure that it is any better in terms of shadow detail, graininess or tonality than TMZ at EI 3200 processed to a neg in dilute Xtol, but it is close, and I think that it has a better dynamic range based on my
limited comparative testing. That's quite important. The drawbacks are the geographical location of dr5 (and hence the turnround time - I've never had it back in less than two weeks), the cost if you are on a budget, and the fact that you end up with a dense positive, so your choices for the next step are constrained. I haven't made comparisons with HP5+ at EI 3200 developed by dr5 and developed to a positive by other methods, by the way. That's on my to-do list.
Best,
Helen