Never owned a mk2 so can't comment but they look good with the kit fitted. However the only documented downsides was they were subject to 'project drive' where MGR cut corners on soundproofing and rust proofing etc. The engine is fine as long as it is looked after. However I suggest you try one before selling up as the V6 is very addictive
If running costs is a factor then the 1.8 will be a bit better but I wouldn't say enough to justify it.