Im looking to keep the silca for mountain biking and replace all the others with one decent road specific pump for road.
You mentioned above that you weren’t interested in CO2 – might I ask why? I switched for road a year or so ago and don’t regret it at all – it cuts down the time to get going again by at least 50% and the cost of 16g cylinders is so low, they’re almost free. I’ve owned pocket-pumps that claim to do road pressures, but the amount of time and effort that it seems to take to get to > 100psi means that I nearly always end up riding home with lower pressure as I get bored of pumping.
I now also use them on the MTB, but the larger 25g carts for the 29er wheels are much, much more expensive. In fact, I now carry multiple 16g instead as they’re loads cheaper and not much bigger!
As far as I can tell, the only big disadvantage is that once you’ve used your CO2, you’re buggered, but I always carry enough to handle at least 2 punctures and, as I ride with other people most of the time, could always lean on a fellow rider to borrow a pump if needed – after all, I’ve used my CO2 to inflate their tyres often enough! 🙂