WD Red or Purple for upgrade?

I'm looking to upgrade my Roamio to 3TB and am having trouble finding the WD Green AV-GP drive at a reasonable price. The WD Red and the WD Purple both seem to be options and are both in the $110 range, but other threads give conflicting advice about which is preferable. Newegg actually shows the Purple as the replacement for the Green AV-GP. Other folks here seem to like the Red. I really need to pull the trigger on one and would appreciate some definitive guidance. Thanks!

WD Red or Purple for upgrade?

WD Red or Purple for upgrade?

I'm looking to upgrade my Roamio to 3TB and am having trouble finding the WD Green AV-GP drive at a reasonable price. The WD Red and the WD Purple both seem to be options and are both in the $110 range, but other threads give conflicting advice about which is preferable. Newegg actually shows the Purple as the replacement for the Green AV-GP. Other folks here seem to like the Red. I really need to pull the trigger on one and would appreciate some definitive guidance. Thanks!

WD Red or Purple for upgrade?

WD Red or Purple for upgrade?

I'm looking to upgrade my Roamio to 3TB and am having trouble finding the WD Green AV-GP drive at a reasonable price. The WD Red and the WD Purple both seem to be options and are both in the $110 range, but other threads give conflicting advice about which is preferable. Newegg actually shows the Purple as the replacement for the Green AV-GP. Other folks here seem to like the Red. I really need to pull the trigger on one and would appreciate some definitive guidance. Thanks!

WD Red or Purple for upgrade?