Here's what I've tested so far:
An arm load of Orcs (pictured in order of stabily), all save for stamp wiped pink beat roller, are are more stable than my beat up/lost Orc. The bright dayglow green is close in stability but it still fades a touch more than the Orc I was worried about losing and recently did, that green w/red Orc is in the bag. I'd trade them all for my lost favorite Orc... it must have known I was looking for a longer alternative. The new run green-yellow with flight numbers, has a huge dome and while overstable is my least favorite of the bunch.
A pair of sparkle Q Astras that turn predictably with a little anny and still have nice late hard fade. I could see these beating into a sweeter longer spot than my lost Orc but it'll take a while to get one there given there aren't too many 400' holes to use them on with the possiblity of whacking some trees to straighten them out. Don't throw these into a headwind without some hyzer and some practice.
A champ Beast that will turnover too much with a lot of snap on a lower flat line. At 80-90% power or some practice with my hyzer release angles it could be a straight with late turn control distance. Right now I'm gonna keep my beat P-PD for go straight lines due to the PPDs security of added HSS. Even my beat Orc was way more HSS than this 2x beast but it wouldn't end to the right without some anny whereas this beast wants to go right naturally which is nice.
A Flow that's made the bag for tailwind bombs. I've only tested two and have two more coming. The blue one is flater on top and the pink one has a nice dome. The blue one made the bag but flips and loses about 5-10' height during its turn before hooking up on a hard lower line. If I don't turn it too much this one works well for the extra distance I was looking for... not a headwind disc but on calmer days can go 400' no problem. I'll try to capture a pic of the dome on the pink flow peeking out over the blue flow.
Into light winds <10mph the Sword will turn a little but has enough fade to come back to straight. Its a touch more stable, I think, than the domey pink Flow.
For big turnover s-lines, I'm putting the yellow S-TD in the bag. My old Orc would go further but this STD will turn so easily on any line and still have some fade at the end. My lost beat Orc would burn out on a high anny distance line and miss out on the extra distance I'm getting with the STD flexing out forward.