Hi, just checking the facts of your Icon manual:
Size: I1, SMART Reserve 99, Reserve size range: 252 cuin min-262 cuin, Main canopy: 90-96, Main size range: 304 cuin min-311 cuin max.
And that are the facts for the Speed 2000 reserve canopies which you can also check out on Paratec's webpage: http://www.paratec.de/en/products-parachutes/57-2/
Canopy Size:150, Max suspended weight(kg): 88, Max operating speed: 150 KTS, Packvolume in cuin: 266.
Both, rig and the Speed reserve canopies are tested and certified according to the same TSO C 23d, so there's a difference of 4 cuin between the recommended max size for a reserve canopy of your rig manufacturer and our Speed 2000 150 sqft reserve canopy.
NOBODY GONNA GIVE YOU THE ADVICE TO PUT A RESERVE INSIDE YOUR RIG WHICH DOESN'T FIT ACCORDING TO THE MANUFACTURER'S MANUAL, and the manufacturer's manual is the only law for us riggers! Of course 4 cuin isn't the problem but then you've got also to compare your main's size etc.
Well, you're right, the Speed 2000 150 is nearly packing as low as a 99 Smart Reserve, with a difference of 4 cuin.
I guess I've packed something about 40 Speed 2000 reserves in all type of rigs in the last 4 weeks, it's really low bulk comparing to other ones. Also my experience, cutting away my main, proofed that the Speed 2000 isn't just a name, it's a fact. The openings are great, really fast, on heading and it's really easy landing it without any problems. That's why they're also preferred for our aff students. Never jumped a 7cell before, they are getting them down like some pros, safe without any problems.
The Speed 2000, if packed like it should be, doesn't fail!
Well, also if you should decide JUST for a 135 sqft Speed 2000, there still gonna be 37 sqft more to safe your ass than on any other 99 reserve.
Just give Paratec a call or send them an email, they're looking forward to help you on your questions or for you other guys to find a dealer nearby.
Greetings from Germany
Eddie