On my TG i have 2 mercruiser 450 with Bravo I , if I'd like to change them ..what should I buy ??
Wich combination it's good for my hull ?

HP525 EFI
525EFI - BRAVO ONE XR DWP
525EFI - BRAVO ONE XR LWP
525EFI - BRAVO THREE XR
525EFI - BRAVO ONE XR SPORT MASTER
525EFI - BRAVO ONE XR SHORT SPORT MASTER
525EFI - BRAVO ONE XR DWP - ITS
525EFI - BRAVO ONE XR LWP - ITS
525EFI - BRAVO THREE XR - ITS
525EFI - BRAVO ONE XR SPORT MASTER - ITS
525EFI - BRAVO ONE XR SHORT SPORT MASTER - ITS
525EFI - DRY-SUMP SIX
525 EFI - SCS

or

HP600 SCi
600 SCI - BRAVO ONE XR DWP
600 SCI - BRAVO ONE XR LWP
600 SCI - BRAVO ONE XR SPORT MASTER
600 SCI - BRAVO ONE XR SHORT SPORT MASTER
600 SCI - BRAVO ONE XR DWP - ITS
600 SCI - BRAVO ONE XR LWP - ITS
600 SCI - BRAVO ONE XR SPORT MASTER - ITS
600 SCI - BRAVO ONE XR SHORT SPORT MASTER - ITS
600 SCI - DRY-SUMP SIX

or

EU662 SCi
662 SCI - DRY-SUMP NXT1

or

HP700 SCi
700 SCI - DRY-SUMP NXT1

Well, I know which one you definately dont want ! With your noise restrictions over there ( they are tight, right ? ), I'd say the EU662 package.

In Italy we don't have noise restrictions for boats ! Only for cars / bikes

Gotcha.

Is there a budget ? Hangin' some 6's on the back is going to be expensive ( both in parts and in rigging ) BUT you could have the mild power in it and not be afraid to run hard. Plus, straight bottom Guns with 6's are VERY rare, so from a re-sale standpoint, you'd have a very desireable rig, even with the mild 525 or 600 power, because someone could always drop in bigger power after they buy it from you. Those packages would be nice and turn-key too, which alot of people want. But set-up and rigging are very, very important, dont know if you have anyone over there that could tackle such a project....upgraded Bravo's in general have come a long way though, and can handle more power than just a few years ago.

My opinion would be go with 525 EFI and Bravo XR Drives. Solid, reliable, turn key package.

525EFI - BRAVO ONE XR DWP
525EFI - BRAVO ONE XR LWP
525EFI - BRAVO THREE XR
525EFI - BRAVO ONE XR SPORT MASTER
525EFI - BRAVO ONE XR SHORT SPORT MASTER
525EFI - BRAVO ONE XR DWP - ITS
525EFI - BRAVO ONE XR LWP - ITS
525EFI - BRAVO THREE XR - ITS
525EFI - BRAVO ONE XR SPORT MASTER - ITS
525EFI - BRAVO ONE XR SHORT SPORT MASTER - ITS

WICH ONE ??

525efi - Bravo One XR LWP

1200 Sterlings and dry 6's with extensions.

Bigger is always better. Always.

If we had to stick to the list, 700's w/NXT's.

I would love to hear how an old straight bottom gun runs with 700's and NXT's.

Since you have not talked funding here is my choice.... Two of those of course...