I’m a bit confused with your winter bike, cross bike, 50th Ti bike thing.
If you’re not going to race cross then there’s not much point in a race frame? The pro6 was viewed as quite harsh and twitchy on berkradar.
A ti roadframe is great and discs would be good on a winter bike that gets used on lanes etc (2nd pair of open sports to replace). I currently run an Etape, love it and would like it cloned with discs and clearance for bigger tyres for comfort =>Kinesis Tripster ATR Ti but I can’t help feel the one road bike I have should be a road bike and not a CX bike I will never use on trails.
Also although it’s great to wait for a treat I’d say live life while you can – you never know what’s around the corner.