SPL Labs is a far supperior product to Termlab. It's as close to the Termlab our local org uses as my old Termlab was (within a tenth). Though the SPL Labs has .00 precision and is wireless with option to use with android app.
Next best is the Makeitlouder.com meter, which is as accurate as whatever DMM used with it... also a good savings.
OP, Keep in mind these are ONLY useful
I have several issues with SPL Labs myself, but the lack ability to play with there new product i won't comment on them. However, I do not see the main orgs changing their meters anytime soon. TL will remain the main meter to be used unless WH decides he is just done..which I don't see any time soon.