Well they look O.K. but how do they perform, it could be interesting but the "you only get what you pay for" adage springs to mind, for me safety doesn't have a cost and I always fit the best available, that is not to say they are no good but reports on their performance rather than price is the main thing.
I have Dunlop Qualifiers on my 21 and they are very good but a bit vague, I will try a pair of Pirelli's next time.
You pays your money and you makes your choice.
D.