Fresh stuff should look pretty decent in C-41, my 14+ year old 500T looks like arse in a standard developer, dmin isnt far away from dmax, 'overexposure' + high contrast developer + restrainer is needed to get a good range out of it.
Dont run it through a lab, the remjet partially comes off in any alkali solution, if you have a tank at home, you can give it a hit both with a little hydroxide with lots of agitation for several minutes, then tip it out and do it again with a fresh hydroxide bath, I've found if you do it right the second bath comes out clear and you've managed to get all the remjet off without having to wipe it with anything ("all" - might be a slight trace of it left on the back sometimes - but it doesnt come out in further chemical steps), and nothing gets into my developer when processing after that, you'd need to rinse in water after that, dry it and get it back into the canister for processing.
There's a ECN-2 pictorial recipe on here, which I tried on the expired Vision1 500T I have shot @ 100 speed shot in 5600K light, worked quite well, grainy though, recipe and exposure needs tweaking, I used CD-4 instead of CD-3 for this too.
Recipe I used:
Processed in 300ml solution with:
0.6g Sodium Sulphite
0.42g Potassium Bromide
7.68g Sodium Carbonate
0.81g Sodium Bicarbonate
0.66g CD-4 (1.5ml of Part-C of Kodak Flexicolor Minilab Developer Replenisher).
Got some CD-2 powder on the way I might try it with instead..
If you have access to colour chems, I mixing up a 2-bath "C-41" developer will work quite well, as the remjet wont budge in the first bath provided its not alkali (which you shouldnt make it), only in the second bath which is fine.. usually just water, alkali and a touch of bromide.
I've also developed without pre-removing the remjet (one shot), dissolves into the developer, I havent found it to affect the results or stick to the film.
Going to try some of the 50D tomorrow in a sheet film holder (ive only got it in 16mm reels).