Welcome to CS
I can certainly recommend the Silvia, it has a reputation of a steep learning curve, but actually all decent espresso machines require the same.
level of barista skill.
Anyway its a solid and well made piece of kit that makes great coffee.
Dont know much about manual lever machines except that they introduce an extra variable [the operator determines the pressure...which is fixed in a Silvia] therefor they would be much harder for a beginner to master.
Reviews on sites like "coffee geek" suggest that in the right hands these machines can produce superb shots, however it would be better to move onto one of these after youve honed your skills on a silvia or similar.
There are not many on this site who would advocate for auto machines such as the saeco. The coffee produced is at best: average and there are generally reliability issues associated with all the additional complexities.
Whichever way you go, remember a good grinder is more important.
Good luck.....let us know how you go