Anto,
Are there any firms or friends nearby who will let you try before buying? Here in the States, Bill Laine at Wallingford Cycles offers a 6-month unconditional guarantee on his Brooks saddles, so a risk-free opportunity.
I've heard good things about Imperials, but if you're getting numbing if the pudendal nerve, there's cost-free things yo can try, including moving the saddle fore and aft on its rails and (most importantly), adjusting the angle. As an alternative, raising the stem and/or shortening reach can sometimes make a huge difference in easing crotch numbness.
Sure worth a try, and I'd get out my wrenches first to see if it worked before reaching for my wallet.
What kind of saddle are you using currently? If not a Brooks, then a change to a different covered-foam-over plastic saddle can often be made for less cost. Before going with Brooks, I was a big fan of the "two-bump" saddles. My favorite was the Avocet Touring II back in the day, but numerous Italian touring saddles of the era shared a similar design.
All the best,
Dan.
