If you haven't looked at cordless reciprocating saws in a couple of years, you'll also be surprised at how slimmed-down and sleek they are (with increased power, though).
Two good choices are the Makita 18V and the slightly higher priced DeWalt 18V reciprocating saws.
The Makita 18V Cordless Reciprocating Saw is relatively light, at 8.1 lbs, and it comes with a rapid charger that can power up a battery in as little as 45 minutes.
Buy Direct - Makita BJR181Z 18V Cordless LXT Lithium-Ion Reciprocating Saw
The DeWalt 18V Heavy-Duty Cordless Reciprocating Saw "provides 1 inch stroke length and 2900 SPM" for cleaner and quicker cutting. Changing blades on "recip" saws can be a pain, so the DeWalt has a keyless blade clamp for quick blade changes.
Buy Direct - DeWalt DC385K 18V Heavy-Duty Cordless Reciprocating Saw Kit
