I've been wanting a seven-string axe for a while now.
Here's a nice one for under 200 with a locking trem, ash body, 24-fret rosewood fingerboard and 2 humbucking pups.:

But instead of the "usual" way of playing with the added low B (BEADGBE), I wanted to add a high A string (EADGBEA) and get super-high notes. I'd have to get a super-thin string like a .007 so it can handle the tension. This is just an experimental side-project I've been wanting to do along with some other extended-range builds.
Then there's a back-up six-string I've been needing.
There's an RG I've had my eyes on:

Or this Kramer:

Both are "shreddy" guitars, like my main ESP, with 24-frets, a locking trem and two humbuckers, but unlike the ESP, the guitars have maple fingerboards and a single-size pup in the middle position (which offer pretty cool tonal options). The RG's set up HSH with a five-way switch and a basswood body, while the Kramer's got two dual-coils in the bridge, one dual-coil in the middle and two in the neck, with coil-tap options for splitting the humbuckers into single coils and an alder body. The RG sounds pretty fantastic, The Kramer I have yet to play. The axe I finally settle on I plan on using as an backup alternately tuned guitar. I'll keep one in standard and one in Eb tuning.