Well I took the plunge and got the type 6.....
I bought her at a station without much in the way of upgrades so I decided not to upgrade anything and fly her one jump to a high tech system....the most pant soiling experience.
On jumping in near a white star the damn thing over heated and wouldn't go to SC....temp got to 135% and I was stuck in normal flight watching my hull drop...90% - 80% - eventually I managed to get into SC and get safely to the station but I thought I was going to loose her on her maiden voyage with about 1m cr in cargo.
I've now upgraded almost everything to grade C and she's doing well, no more overheating. She flies better than expected and I'm loving the credits I'm getting
I've even evaded a few interdictions....so I'm a happy commander.....thx all for you help and suggestions.