Some other opinions
The circuit layout of the regular OTS and HRM are pretty much the same, with the exception of a gew different part values. So you can easily mod an HRM to be like the OTS. IMHO the internal HRM tone stack at the end of the OD stage is nothing you would miss if you didn't have it.
Knowing this, and that I'd preferred the standard OTS sound, I got an HRM - but only because one was immediately available on ebay and it had several options added.
If you do not intend to build it or mess around inside, then go with the OTS.