^ Yeah my workflow is Audition > TLH. I'm not a tagger though...
I agree a simple workflow is best.
In this case OP seemed to be thinking about going through and converting files post facto in which case the workflow considerations may be different (though no less important). Foobar seems to have a few more steps in the process or be a little more confusing to me though I may not know how to use it best/fully...
Foobar is absolutely best for converting the European broadcast MP2's to WAV though. Better processing than other options in that case (TLH doesn't support those).
Another vote for Foobar2000. It's been a while since I used TLH to convert to MP3, but if your FLAC files are all tagged with artist, album, song titles and track numbers, it seems like TLH doesn't preserve everything when you convert to MP3 - I want to say the track numbers? So if you wanted them back you had to add them back in manually (folks can correct me if I'm wrong, like I said it's been a while, but there's a reason I kept looking for an easier way)? In any case, I looked for quite a while to find something easy that preserved all the tags and foobar2000 was it for me. It does take a little time to set up the first time (you have to download and install the right plug-ins, I think they call them VSTs - but definitely LAME is available and that's what I've been using). Once you have it set up, all you have to do is open the FLACs, right click and pick "convert". After the first time (assuming you want to keep all the same options like bit rate, etc. - I always use 320 kbps), all you have to do is pick "last used" and point it to the folder you want them to go to and you're done.
I use Audacity to process and tag everything as I export to FLAC. To get the MP3s, then all I have to do is open them with foobar and select convert and point it to the directory I want them to go to. It's as simple as I've been able to get the workflow and still have everything tagged, etc. like I want it. I'm sure there are probably other ways to do it, but that's as simple as I've been able to make it. I've tried a lot of MP3 conversion utilities but stopped looking for something else when I started using foobar. Just my 2 cents;)