Nope, neither. Still around $5,300 bone stock and up from there dependent on the mods/how desperate the seller is. The ones that sold at or below $5k were few and far between, and were all with the older code and "stigma" that it wasn't going to get another update. And for that matter after 1.5 I wouldn't expect to see it dip to $4,500, unless you have a seller that is very desperate....but that is the exception and not the rule.
And for what it's worth: I would never call 1.51 the "final" update. There's noticeable bugs in 1.51 that I'm sure Waison/Borg wouldn't want sticking around, so I would have to assume that, when they get a chance, they'll release another update. Maybe not an update with any big gameplay changes, but definitely something to abolish the few bugs that are left.
As to the Op's question:
Of course, as was previously said in this thread, everyone is going to give biased advice that owns an XM. They will recommend whichever model of XM they have. Having said that, here's my biased opinion,lol. But I'll try to give as many hard reasons for my answer as I can....
My vote is LE (shocker). For me, the Iceman ramp is negligible....if the LE was without it I would t mind, it doesn't had THAT much to the gameplay. But the spinner: awesome, especially with the MagsMB theatrics. The NC pop ups are fun and are a great bonus for your non-pinhead friends when they play; it's really neat to watch someone see it for the first time without expecting it. They also, for that fact, make it much easier to attain the extra ball from them on the LE than the pro.
The art packages for all the models are awesome, so in my mind you can't go wrong either way on that front.
To me though, of the features the biggest difference maker is the color GI "choreography". Everyone is falling over themselves about how great the new MET code utilizes the color GI zones, but I've played MET for a few hours on 1.5, and it's nowhere NEAR as well utilized as XM is. Each Villain has their own color scheme in the GI, the apron flashers on the LE that let you know when Deadpool is ready to hire are a really neat effect. But the light show is the main reason why I went LE rather than a pro.
The other great reason to go LE is because there's no premium here, just the two models, so there's a bit of exclusivity there with the features as well. And for the relatively low price difference at the moment between the pro and LE, the extra $ for the LE is a pretty good bang for buck difference.
But the pro is an fantastic bang for buck. If financially the pro is more in your range and you'll really have to stretch things and go out of your want in order to snag an LE, then go for a pro. At the end of the day; either way you end up with an awesome title!!