What make/model of BD player do you have?
Regarding ordering, Amazon.co.uk is super easy to deal with. Often it has cheaper prices than Amazon.com (ie X-Files complete series) and sometimes seasons are only released outside the US (Homeland S7...).
EDITED UPDATE: turns out LA Law complete...
Hello. I bought seasons 1-3 from Shout Factory then later the complete series UK R2 box set when it was on sale and far cheaper than importing the later seasons individually. I never bothered to check out the R2 seasons 1-3, and after reading about the potential PQ differences I pulled them out...