KEEP THE 155 !!
You'll regret selling her from the the moment you hand over the keys.
When she's driving away from you, you'll look and hear her and you'll want to run after her and rip her back out of the hands of who took her away.
Brakes are easy to sort out.
Remove all the calipers, clean em up, make sure the sliders are well greased and moving freely. Get some nice fresh fluid in the system, bleed it through .. don't forget the clutch slave.
Make sure the rear bias is working properly - you'll be amazed how much difference it makes when the rears are helping to brake - jack up the rear passenger side, put her on stands so the suspension is compressed, you'll see the valve above the exhaust.
Spray some wd40 on the adjuster bolt, persuade it to move, make sure the cylinder on the valve is moving, you should be able to feel it moving when pulling down on the adjuster, make sure the spring is doing its job - maybe shorten it like I did - hang 10kg of weight on the adjuster maybe a bit more if you want, job done.
I had to do mine last week (rear bias), it took about 30 minutes, including shortening the spring.
gone but never forgotten . new blue
XBOX Gamertag : celadon278
Xbox Forza3 AO : Class B joint 3rd