I did my fronts - all of them - in rubber. Why all? Even if they don't look worn, rubber ages and looses its elastic qualities. [I know Art Bernstein and a few other will disagree and think it is excessive]. I wanted the best ride I could get and was willing to put the effort into pressing out the small A arm bushings. I used poly in the rear - every bushing- in my '88 245. In hindsight, I wish I had used poly in the front: Firmer feel. I live in a temperate climate. I have no idea how poly performs or changes as temps drop. Poly trailing arm bushing should outlast rubber, or so the lore goes. If you go rubber, avoid Scan Tech. In my fronts I used OEM Volvo for rear A arm [the large] bushings. I figured there was a reason Volvo designated a left and a right part where aftermarket didn't. No, I can't tell you the reason, I took it on faith. But doing bushings definitely was a major improvement and restored a great "seat of the pants" feel to my Volvo. That made it worth the effort. The other philosophy is a "make due" repair of necessary parts if you want just want to keep it running. Depends how fussy you are. But don't expect a Volvo to ride like a Lexus even with all new bushings.