Help Choose A Split

[xenithon]

Hi All,

I am fed up of this plateau and really want to break out of it. Have tried changing reps, sets, drop sets, pyramiding, supersetting etc. and I think it is the split itself which has become stale. Currently it is:
Mon - Quads, Hams, Abs,
Tue - Chest, Tris
Thu - Back, Bis
Fri - Shoulders, Calves, Abs

Recently tried a 2-day, twice a week split but that didn't workout. I have two choices methinks:
1. Stick to a 4-day split and change up the muscle groupings
2. A split to hit each muscle twice a week, such as conjugate strength/hypertrophy split

If I go 4-day, I had the following in mind:
A
Mon - Quads, Hams, Abs,
Tue - Chest, Bis
Thu - Back, Tris
Fri - Shoulders, Calves, Abs

B
Mon - Quads, Calves, Abs
Tue - Chest, Shoulders
Thu - Back, Hams
Fri - Bis, Tris, Abs

If I would do a conjugate split, from what I have read, it would be something such as:
Mon - Upper body strength (2 exercises per body part, 3 sets each, 4-6 reps, mainly compound exercises)
Tue - Lower body strength (2-3 exercises per body part, 3 sets each, 4-6 reps)
Thu - Upper body hypertropy (2-3 exercises per body part, 3 sets each, 8-10 reps, compound and isolation exercises)
Fri - Shoulders, Calves, Abs(2-3 exercises per body part, 3 sets each, 8-10 reps)

EDIT: One other option I was considering is a compromise between hitting muscles once a week and twice a week, by hitting them 3 times in two weeks. What I would do is use a 3-day split such as:
1 - Quads, Hams, Calves
2 - Chest, Shoulders, Abs,
3 - Back, Bis, Tris

And I would do the following over a 2 week period: 3 on 2 off, 3 on 2 off, 3 on 1 off. In other words:
Mon - workout 1
Tue - workout 2
Wed - workout 3
Sat - workout 1
Sun - workout 2
Mon - workout 3
Thu - workout 1
Fri - workout 2
Sat -workout 3

Please can you guys help me decide (I really suck at decisions! )

The aim is mass and strength, but with the focus being on mass.

Thanks for any advice,
X
PS. I am not looking for 3-day or 5-day splits please.