Lately, lots of peeps have been using Lightning mafs and mafs from SCT.
The Lightning maf is IIRC, 90mm but I don't know the size of the SCT meter. These meters can't be used in cheat mode so a custome tune is in order for them.
Granitelli (?sp?) makes a pretty good maf from what I have read.
The ProM 77mm & 80mm meters are out there but there have been reports that some of the meters made in the last year may not be too accurate.
For a blown combo, I've seen some say the C&L won't work or doesn't work that great if you are gonna use 42 lb inj's.
As for meter size and a blown combo, I'd want something larger than a 75mm maf.