^^^^^^
Absolutely! Power increase to 146bhp I do believe. Speed wise, it's quite fast enough and if you fit cruise you shouldn't really notice the caravan on the back. Hills shouldn't be an issue.
Mechanically, yes they are chain driven. After nearly 130k our CD spec has not had one single suspension component replaced, no wear reported on MOT, yes, it STILL drives tight as a drum! Even after covering more than half of that with a box van trailer.
They are noisy from startup, not the most refined diesel engine, but after 20-30mins driving they settle down a treat, not too noisy on the inside of the car though as it is well soundproofed and has a reasonable radio

Sure you know they are all manual gearboxes on the DTi. Economy wise, if you drive like a saint you could see 48mpg. Real world figure, 43/45mpg for us. 30-32mpg with a trailer on. Torque figure is the same as the 3.2 V6 omega, nice and smooth right through the rev range and should soar easily to 100mph (officer

)
Ours has only been recovered once by AA, clutch slave cylinder - from reversing trailer uphill. DOH!

Other than that, nothing mechanically has been replaced, apart from exhaust. Ours has oil changed about every 10k also and is flushed with forte, which really improves economy.
Best of luck. Hardest part now is finding one with a low mileage

Alan, you have had all glowplugs checked?