actually, it's not really spin that does it. the key is snap and line.
sounds like you probably have a very clean release, which is rare nowadays. most players torque badly and s nearly everything.
if the orc is a champ orc, they rarely turn unless you force them to or are throwing like 450'.
the starfire and orion should get nearly the same D if you throw them with equal power on their intended lines. i honestly believe the orion probably has a little more distance potential for most players since it is an easier disc to hyzer flip and hold nose down through a turn (with enough height under it).
most newer drivers aren't good for true S paths. the dx eagle is one of the last good s curve drivers out there. newer discs generally don't fade predictably enough to be utlilize the s well, unless they are very overstable and thrown anhyzer. distance anyhyzers open up the options quite a bit.
one thing to keep in mind is that height will come into play a lot with most discs. while it is feasible to throw 400' with a starfire at 10' of height, 450' will require more like 20+' of height.
as for courses, the 2 closest to my apartment are kaposia and acorn, but highland is the closest by far when it is open. i live by the u of m near 94 and 280.
the place i work at is: http://www.gottagogottathrow.com
this is likely my last week there... not sure when my last day is exactly. if you pick a day you would like to come in, i can try and make sure i am there. wed they are open till 8pm, otherwise till 6 on other days (closed on weekends).
they have some really good deals going on right now. $9.95 for the champ orc, sidewinder, valk, coyote, and teebird. $9.95 for the z flash, crush, buzz, flick, wasp, and xl. $8.95 for the z mrv. $7.49 for the jk aviar, pro starfire, x soft challenger, and x xs. $5.95 for the dx archangel, dragon, and roc and pro d venom, drone, and soft magnet, as well as the x mrv. $9.95 for quarter k's as well.
pumpkin stamps for $5.25 dx, $6.95 elite x, $8.95 elite z. notenboom cyclones, xclones, and stratuses for $5.25.
random lil stuff, not that i'm a fan of dyed, but if you are i have also been getting stuff dyed by j-bird there that isn't normally available, e.g. x avengers, z flicks, x crushes, champ sidewinders, pro starfires, pro wraiths, and orions.