are you ready for the voice of reason?
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Seriously, probably any new (post 2005) is going to make your car pale in comparison. Simply because its newer
By the description of your Ti, it sounds like yours if quite a decent version, albeit in poorer condition.
The lock issue , just a lockingmotor solonoid,
the plastic cover easily sourced and replaced
headliner repair simple enough, just time consuming but there are DIYs on the Org
The seats, well thats a matter of budget. get what you feel you need there, but there are full cabins for sale regularly
The service. Oil filter, Air filter, Spark plugs and coolant swap. All have DIYS on here
The bushes are probably a workshop job if you arenīt equipped, But there are a few friendly lads here that may be willing to help for beer money
Compare the cost of the above against the potential monthly cost of leasing/loaning the money for a 1 series or such..
Trust me when i say, for the money you will "give" away, you could turn yours into a minter
I however chose the darkside and sold the Ti on for an E90
It wasnt the most fiscally sensible decision, but i am happy with the car as she is
So think about it, but in the end it is up to you