The Forester Spring option is for the two generation older model Outback ('95-'98/'99 I believe?) that uses struts in the rear, as the Forester does. There is also the trick of using
Baja Springs for the earlier '00-'04 Outbacks, but
adapting them for use on the '05-'09 Outbacks has not been done yet that I am aware of, and apparently would require the use of earlier model year top hats as the springs have a different trailing edge.
I've been considering lifting mine one way or another, so you might want to
read my ramblings in this thread for some additional details..
You can get a one inch lift with either
King Springs or
Subtle Solutions Lift 'blocks'.
As for tires, a 215/65-16 will fit, even without a lift. Keep in mind that the Outback Models that came with 225/55-17's actually had a taller tire stock at 26.9" tall, so a 27" tall tire is not an issue at all.
Because of the wheelwell size of the '05 Outback though, the biggest tire that seams to fit is about 27.6" tall (a 225/60-17 -- The equivalent 16" size would be a 225/65-16.
There are tires available in this size, but nothing to my particular liking - Okay,
there was a Nokian, but the load range was way too high at 112), beyond that you would need alot of lift, not just a little to make a larger tire fit.
A 215/70-16 tire (28" tall) would be tight, but should work with a small lift.
There was a member that just sold a set of 16" wheels with 215/70-16 Yokohama Geolandar A/T-S tires recently, and he said that they fit with minimal rubbing on his stock Outback. I'm a bit concerned that they may have rubbed a bit more than minimally though, but trying to find out some additional info as I might be interested int his size if it would work with a small lift..
One last thing. If you haven't already, you should read through the
2005-2009 Outback Suspension FAQ as well..