Exist stiff all-round blade?

Yep .. I've played with it, although not with LP .. Quite a nice blade ... The only downside, for me, was the weight ... 

I'm also looking @ the Allaround CR variant ... It's a wee bit stiffer, and also lighter 

Too expensive.

If you like the stiga all round classic but all-round carbon is too fast maybe look for a Chinese clone of this blade with more thickness? It will be faster but usually less flexy blades are faster. It seems like you want the blade equivalent of the mythic rubber that is like an anti when blocking and high spin when you want a power shots.

I'm not personally adverse to the All-round Classic CR, but I feel Stiga has recently developed better top plies than the CR coating thing, i.e., Evolution, Nostalgic, etc. Although I like the CR concept, I feel I can achieve those qualities with AFM BP Safecoat non-toxic sealant and UV hardening. Having said that, I would not pass up an FS thread opportunity for a good price on an All-round CR ST handle. ;-)

It's a good recommendation! I just feel there might be a couple slightly better options by Stiga. ;-)

BTW, I did pick up a Nittaku Violoncello. We'll see how that goes. 

I have Metal that's also front part of the blade treated with dust metal & don't liked the feeling.

Blade stiffness (lack of flex)

and

Blade hardness (top ply rebound) 

are two different things.

While CR blades are good for the plastic ball (hardness, rebound speed) they are not necessarily stiff.

Hope that helps.