I see you're selling a set of Phantom armor and 5B plates in another thread. If you are serious about buying a Limited set of armor, you might want to hang on to your 5B plates.
Since you'd been using Phantom, going to Perseus would be overkill imho, and a waste since mu on the cheapest Perseus you can buy right now will be around 145% (450 ped of mu).
Martial (L) is plentiful and quite cheap on the auction right now, since the Longtooth have been dropping Martial armor parts all summer, so I would recommend just getting that. It's easy to get parts for 105-110% and that set is even better than Phantom imho.
Take care and gl!
Legends